Biology_of_Mustelids_Vol_1.pdf

72.
TABLE 7.
Sexual dimorphism of absolute dimensions of the skull
Semi-adult stoats
Adult stoats
No. Measurements arithmetical arithmetical
means o III means 0 III
'.-1IE:~
j~~
males females +3""'-
Ill..o c: m~es fe~es III ..0 c:
Ma Mb a:: IE: -.-1 a a:: IE: •.-1
A. Measuremants along longitudinal axis of skull
1 Basilar length 39.81 35.84 90.0 41.31 36.97 89.5
2 Condylobasal length 44.31 39.81 89.8 45.91 41.18 89.7
3 Diameter of upper canine 1.80 1.46 81.1 1.89 1.54 81.5
4 " lower " 2.16 1.83 84.7 2.27 1.91 84.1
5 Length of hard palate 17.33 15.26 8B.1 18.16 15.91 87.6
6 Length from foramen
magnum to hard palate 22.51 20.56 91.3 23.18 21.09 91.0
7 Length of tympanic bulla 14.34 13.02 90.8 14.71 13.38 91.0
B. Measurements along transverse axis of skull
8 Width of nasal aperture 4.63 3.96 85.5 4.84 4.16 86.0
9 Rostral width 8.86 7.64 86.2 9.37 7.98 85.2
10 Interorbital width 10.53 9.14 86.8 11.10 9.61 86.6
11 Width of hard palate 13.45 11.93 88.7 13.98 12.40 88.7
12 Width between ends of
supraorbital processes 12.72 11.22 88.2 13.37 11.64 87.1
13 Zygomatic width 24.37 21.45 88.0 25.60 22.39 87.5
14 Postorbital width 10.59 9.96 94.1 10.59 9.80 92.5
15 Auricular width 20.79 19.04 91.6 20.96 19.17 91.5
16 Mastoid width 21.40 19.11 89.3 22.28 19.73 88.6
17 Width of foramen magnum 7.86 7.10 90.3 8.04 7.25 90.2
c. Measurements along vertical axis of skull
18 Height of nasal aperture 5.99 5.26 87.8 6.30 5.47 86.8
19 facial [rostral] height
of skull 11.83 10.61 89.7 12.25 10.84 88.5
20 Height of skull in region
of tympanic bullae 17J" 09 15.16 88.7 17 .41 15.31 87.9
21 Occipital height 11.31 10.23 90.5 11.64 10.42 89.5
22 Height of foramen magnum 6.14 5.60 91.2 6.21 5.74 92.4